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Finding the Fourth Proportional to 435,053.80, 654,330.30 and 389,564.20

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Solution

The fourth proportional to 435,053.80, 654,330.30 and 389,564.20 is: 585,912.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    435,053.80 : 654,330.30 = 389,564.20 : x
  2. Step 2: Convert to fraction form
    435,053.80/654,330.30 = 389,564.20/x
  3. Step 3: Cross multiply
    435,053.80x = 654,330.30 × 389,564.20
  4. Step 4: Simplify right side
    435,053.80x = 254,903,659,855.26
  5. Step 5: Solve for x
    x = 254,903,659,855.26/435,053.80
  6. Step 6: Final answer
    x = 585,912.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.